Canon RF70 -200mm F2.8 L IS USM adopts excellent optical design

   After more than a year of development, the Canon EOS R series full-frame mirrorless RF mount camp has been considered relatively full, and the high-end red circle L-level lens is also one after another, and among them, the Canon RF70-200mm F2 The launch of the .8 L IS USM is a milestone, because so far the F2.8 constant aperture “big three yuan” lens of the Canon RF mount is finally available, and I believe this RF70-200mm F2.8 L IS USM lens Together with the RF15-35mm f/2.8L IS USM and the RF24-70mm f/2.8L IS USM, the Canon EOS R full-frame mirrorless lens will serve as the facade for the next few decades.

Canon RF70 -200mm F2.8 L IS USM adopts excellent optical design

   Thanks to Canon’s self-developed large-diameter RF mount and The optical design flexibility brought by the short back focus distance, and the introduction of multiple technologies based on UD aspheric lenses, dual NANO USM ultrasonic motors, and electronic floating focus mechanisms, not only provide faster and quieter focusing, but also achieve the lens length The drastically reduced, with very good mobility and portability. The RF70-200mm F2.8L IS USM lens adopts an optical structure of 17 elements in 13 groups. With the help of 1 glass molded aspheric lens and 1 UD ultra-low dispersion aspheric lens, the spherical aberration correction and zoom lens miniaturization are realized. Three UD lenses and one super UD lens are arranged efficiently to greatly correct chromatic aberrations and reduce the color halo from the center to the edges of the screen to achieve high image quality. In addition, the lens also applies Canon SWC sub-wavelength structure coating, which has excellent anti-reflection, especially for light with a large incident angle, which can reduce the possibility of flare and ghosting at the edge of the lens with large curvature. In addition, the lens adopts a 9-piece circular aperture design, and the closest focusing distance has also been improved. The closest focusing distance is only 0.7m, which provides a good 0.23x magnification.

  The lightest 70-200mm full-frame lens ever

   No matter what brand of lens, 70-200mm is very common and important The focal length of the lens, especially scenery, portraits, sports and animals, etc., but for this type of lens, coupled with a constant F2.8 aperture, this is not too obvious in the size and weight of the previous products. At the same time, it is also the most powerful lens in the “big three yuan” lens. Even professional photographers will sometimes find it difficult to shoot for a long time. The new RF70-200mm F2.8L IS USM makes perfect use of the advantages of the large aperture and short rear focus distance of the RF mount. It breaks through the previous inherent ideas in lens structure and design, and not only uses a retractable type. The outer zoom lens barrel is designed to be significantly slimmer, and the weight is also controlled at 1070g. Such specifications were absolutely unimaginable in the past.

Canon RF70 -200mm F2.8 L IS USM adopts excellent optical design

   Canon RF70-200mm F2.8L IS USM lens length is greatly shortened , The shortest time is only about 146mm, which is about 27% shorter than the EF 70-200mm f/2.8L IS III USM, and the weight is only about 1070 grams, which is about 28% less.

Canon RF70 -200mm F2.8 L IS USM adopts excellent optical design

  70mm lens Overall length

Canon RF70 -200mm F2.8 L IS USM adopts excellent optical design

  200mm The overall length of the end lens

   Canon RF70-200mm F2.8L IS USM lens is only slightly longer than the RF24-70mm F2.8L IS USM at the 70mm focal length. If it is a long time outdoor shooting, no matter It is much more convenient to carry or hold; and even the 200mm telephoto end is about the same length as the “little white umbrella” of the EF mount. In addition, the RF70-200mm F2.8L IS USM lens has been greatly shortened in length, and its weight is also correspondingly lighter. This is mainly due to the use of engineering plastics in the lens body, but the same thing is that the lens feels still Very solid and reliable.

Canon RF70 -200mm F2.8 L IS USM adopts excellent optical design

  RF70-200mm F2.8L IS USM with Canon EOS R Micro

Canon RF70 -200mm F2.8 L IS USM adopts excellent optical design

  RF70-200mm F2.8L IS USM with Canon EOS R special micro

  Although it uses a retractable lens barrel design, as a high-end red circle lens, RF70 The tightness of the lens barrel of -200mm F2.8L IS USM is still quite high. Although the zoom lock button/stick is designed, the damping of the lens barrel is very good even in the unlocked state, and it will not shorten the elongation for no reason.

Canon RF70 -200mm F2.8 L IS USM adopts excellent optical design

   The zoom ring is located The front of the lens is very wide

Canon RF70 -200mm F2.8 L IS USM adopts excellent optical design

   is the manual focus ring, and the lens is made in Japan

   should be considered to make the lens more concise, and because of the size, RF70-200mm F2.8L IS USM does not look like an EF card The focus distance window is designed like a lens. However, with the EOS R series mirrorless camera, you can perform a variety of manual focusing operations by looking at the viewfinder and screen. For most users, the focus distance window is indeed unnecessary.

Canon RF70 -200mm F2.8 L IS USM adopts excellent optical design

  Multi-function control Ring position lens tail

Canon RF70 -200mm F2.8 L IS USM adopts excellent optical design

  The closest focusing distance is 0.7m, and supports 0.23x maximum magnification

Canon RF70 -200mm F2.8 L IS USM adopts excellent optical design

   IS anti-shake of the lens is upgraded to level 5, and “Mode 3” anti-shake specially designed for sports photography is added.

Canon RF70 -200mm F2.8 L IS USM adopts excellent optical design

  9 aperture blades

Canon RF70 -200mm F2.8 L IS USM adopts excellent optical design

   Although the lens is lighter, it also comes with a special tripod Ring and hood

Canon RF70 -200mm F2.8 L IS USM adopts excellent optical design

  Canon RF70-200mm F2.8L IS USM lens completely body

Canon RF70 -200mm F2.8 L IS USM adopts excellent optical design

   There are threads inside the lens, and it is also very intimately designed for convenience Adjust the small window of the filter

Canon RF70 -200mm F2.8 L IS USM adopts excellent optical design

   Generally speaking, in appearance On the one hand, the RF70-200mm F2.8L IS USM adopts a telescopic zoom method in order to maximize the advantages of the short rear focus distance of the RF mount, achieving a substantial miniaturization. In addition, it is also worth mentioning that, in order to maintain the weight balance of the lens during shooting, most of the lenses are arranged at the back of the lens, so that the center of gravity is close to the side of the camera, even if the telephoto end of the lens barrel is extended. At the same time, it can also maintain the weight balance and has a good grip.

   maintains super high optical quality

   Although this time the Canon RF70-200mm F2.8L IS USM is External zoom design, but this will not affect the imaging and other optical performance of the lens. Among EOS SLR cameras, the EF 70-200mm F2.8L IS III USM lens has a very high level of optical and image quality, and has been well received by many photographers and professional photographers. This time it is used as a Canon RF mount. The first 70-200mm lens, RF70-200mm F2.8L IS USM naturally has a different design and idea in terms of optical structure. It uses an optical structure of 17 elements in 13 groups, but is equipped with 6 special lenses, including 1 Aspheric lens, 1 UD low dispersion aspheric lens, 1 super UD and 3 UD lenses. ASC coating is also added, and it can be expected that the lens will perform better when shooting in high-contrast environments such as backlighting.

  Sharpness:

   First, let’s take a look at the lens resolution test. When shooting I chose to match the Canon EOS R full-frame mirrorless camera with 30.3 million pixels. The shooting parameters are A-speed aperture priority, the finest quality JPEG format, ISO 100, full pixel size output, automatic white balance, and standard color mode. .

Canon RF70 -200mm F2.8 L IS USM adopts excellent optical design

  70mm focal length 100 %Zoom in the screenshot area

Canon RF70 -200mm F2.8 L IS USM adopts excellent optical design

   In the case of full aperture, Canon RF70-200mm F2.8 L IS USM has sharp center image quality, even the edge position is also very clear, basically it is fully usable when F2.8 is fully open; and when the aperture is reduced To F5.6-F8, at this time the RF70-200mm F2.8 L IS USM achieves the best picture quality. But what is more surprising is that under a small aperture such as F11-F16, zoomed in to 100%, the entire picture from the center to the edge shows a super resolution, the picture has layers, and the center and edges have high sharpness. The degree and contrast are also excellent, which fully highlights the advantages of the RF mount and the Canon L-level red circle lens.

Canon RF70 -200mm F2.8 L IS USM adopts excellent optical design

  200mm focal length 100 % Enlarged screenshot area

Canon RF70 -200mm F2.8 L IS USM adopts excellent optical design

   at the telephoto end of 200mm When the Canon RF70-200mm F2.8 L IS USM lens was fully opened from F2.8 to F11, the center and edge image quality under the small aperture of F11 all showed the strength of the lens. Basically, it can be used with confidence in F16 aperture. At the minimum aperture of F32, the image quality is degraded to a certain extent due to lens diffraction. However, compared with such a small aperture, it will not be used frequently, so it does not affect the optical quality of the lens.

   distortion:

Canon RF70 -200mm F2.8 L IS USM adopts excellent optical design

  70mm

Canon RF70 -200mm F2.8 L IS USM adopts excellent optical design

  200mm

   Through our actual shooting test, we can see the distortion control of this Canon RF70-200mm F2.8 L IS USM lens The ability is quite good, there is no obvious distortion at the 70mm end, and no pincushion distortion at the 200mm end.

  Vignette:

Canon RF70 -200mm F2.8 L IS USM adopts excellent optical design

  70mm

Canon RF70 -200mm F2.8 L IS USM adopts excellent optical design

  200mm

   When the F2.8 aperture of the 70mm end is fully opened, there is a loss of light around the lens, but it is not very obvious. After reducing the aperture by 2 stops, it can basically Elimination of vignetting; while at the 200mm end, the loss of light of the lens is more obvious than that of the 70mm end, and there is no obvious vignetting after the F8 aperture is closed.

   Dispersion:

Canon RF70 -200mm F2.8 L IS USM adopts excellent optical design

  70mm

Canon RF70 -200mm F2.8 L IS USM adopts excellent optical design

  200mm

   When shooting objects with high light ratio, the general lens is more prone to chromatic dispersion, and the form is often purple fringing or blue-green fringing, but The performance of the Canon RF70-200mm F2.8 L IS USM lens is pretty good this time. At 70mm focal length, the maximum aperture of F2.8 has only a slight dispersion. After the aperture is reduced by one stop, the metal surface and edges are almost invisible. On the other hand, it seems that UD lenses and fluorite lenses have played a significant role. At the 200mm end, the chromatic dispersion appears blue and orange when the aperture is fully opened, which can be eliminated after reducing the aperture by 2 stops.

   Anti-shake:

Canon RF70 -200mm F2.8 L IS USM adopts excellent optical design

   shooting scene and screenshot area schematic

Canon RF70 -200mm F2.8 L IS USM adopts excellent optical design

This time, Canon’s RF70-200mm F2.8 L IS USM gave me the most profound image. It has the highest level of anti-shake compensation, which is upgraded from level 3.5 of EF 70-200mm F2.8L IS III USM to level 5. The effect of the shooting is not just a change in the figures on paper, but realism can bring a better shooting experience. Just like the effect shown in the picture above, the RF70-200mm F2.8 L IS USM is completely capable of hand-held shooting clear photos within 1/13s shutter speed, even at the more extreme 1/6s shutter speed, there are also very large The odds will not be false. In addition, combined with the advantages of the F2.8 large aperture, the lens can obtain a higher shutter speed in a dark environment, and shoot clear and cleaner pictures with a lower ISO.

  More Canon RF70-200mm F2.8 L IS USM lens real shot samples:

Canon RF70 -200mm F2.8 L IS USM adopts excellent optical designCanon RF70 -200mm F2.8 L IS USM adopts excellent optical designCanon RF70 -200mm F2.8 L IS USM adopts excellent optical designCanon RF70 -200mm F2.8 L IS USM adopts excellent optical designCanon RF70 -200mm F2.8 L IS USM adopts excellent optical designCanon RF70 -200mm F2.8 L IS USM adopts excellent optical designCanon RF70 -200mm F2.8 L IS USM adopts excellent optical designCanon RF70 -200mm F2.8 L IS USM adopts excellent optical designCanon RF70 -200mm F2.8 L IS USM adopts excellent optical designCanon RF70 -200mm F2.8 L IS USM adopts excellent optical designCanon RF70 -200mm F2.8 L IS USM adopts excellent optical design

   Evaluation Summary

   As the first 70-200mm focal length of Canon EOS R series and equipped with F2.8 constant maximum aperture lens product, RF70-200mm F2.8 L IS The USM lens first occupies a great advantage in appearance, and at the same time provides better mobility for carrying and shooting. Although the design of external zoom is adopted, this does not mean that the lens is unreliable, because both 24-70mm or 100-400mm lenses on the EF mount are also designed with external zoom, so there is no need to worry about the protective performance of the lens.

Canon RF70 -200mm F2.8 L IS USM adopts excellent optical design

   Next, RF70 -200mm F2.8 L IS USM adopts excellent optical design. The application of special technologies such as UD aspherical lens and super UD lens combined with the advantages of EF mount has achieved another breakthrough in image quality, and added ASC coating for effective enhancement In order to improve the image quality performance in backlit and high-contrast scenes, the appearance of glare and ghost images is greatly reduced. All in all, “high image quality” and “miniaturization” are the most obvious labels of this lens. If you are a Canon EOS R series micro user, then this lens is absolutely essential.

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